Abstract: A video data-based system for blood pressure prediction. The video data-based system for blood pressure prediction comprises: a first device and a cloud server, where the first device comprises a first master control module, a first camera, a lighting module, a display screen, and a first communication; the cloud server comprises a second master control module, a validity validation module, a parameter validation module, a data preprocessing module, an artificial intelligence blood pressure prediction module, and a second communication module. The use of the video data-based system for blood pressure prediction provided in the embodiments of the present disclosure obviates the need to wear any specific collecting device for the real-time detection and continuous monitoring of the blood pressure, thus reducing the difficulty of implementing the real-time detection and monitoring of a test subject, and enriching the application scenarios of photoplethysmography in the field of guardianship.

Abstract: A method and apparatus for communicating wirelessly comprising creating a plurality of sub-carrier signals by quadrature amplitude modulating data onto a plurality of sub-carrier frequencies spaced apart by a sub-carrier frequency spacing interval, frequency shifting the sub-carrier signals by one half of the sub-carrier frequency spacing interval, and modulating the sub-carrier signals onto a radio frequency carrier wave for wireless transmission.

Abstract: A method and apparatus for communicating wirelessly comprising creating a plurality of sub-carrier signals by quadrature amplitude modulating data onto a plurality of sub-carrier frequencies spaced apart by a sub-carrier frequency spacing interval, frequency shifting the sub-carrier signals by one half of the sub-carrier frequency spacing interval, and modulating the sub-carrier signals onto a radio frequency carrier wave for wireless transmission.

Abstract: A wireless communications device (200) is provided. The device includes a demodulator (210) configured for computing estimated bits for a modulated input signal 220 representing a the symbols associated with a frame, the estimated bits including estimated values for a frame of bits and at least one forward error correction (FEC) error bit encoded into the symbols. The device further includes an FEC decision decoder (212) configured for receiving at least a first portion of the estimated bits and calculating values for a first portion of the frame bits associated with the first portion of said the estimated bits, where the estimated bits are computed based on a condition of a communication channel associated with the modulated input signal and a frequency deviation associated with said demodulator.